Combos in this deck: 

#1: Brann, zephyrys, Zola, banker

#2 if you managed to play at least a few spells: YOGG!

#3 power of creation is extremely good in wild in my opinion, since you can usually discover at least 1 good dethrattle minion (Sylvanas being arguably the best) and it creates nice games with N'zoth

If you manage to keep emperor alive for 3 turns, frost lich + geddon is usually almost a full heal and wins you the game 90% of the time if you pull it off.

Brann+ janalai is also a great combo, though a bit slow to get in this deck.

MULLIGAN GUIDE:

Against Aggro: Zephyrys, doomsayer, deathlord and ice block, possibly also glyph for some good discovers

Against control: doesn't really matter that much but I've had the most success with keeping the biggest value cards (mainly Kazakus and emperor) and of course zephyrys

Against priests: POLYMORPH AND ZEPHYRYS! THEY WIN YOU GAMES! (Counterspell is also amazing)

against druids: Geist, most druids after rank 8 play either taunt or jade druid

Against fellow mages: zephyrys and Zola/brann/banker because you want to destroy their secrets, draw is also valuable.

Against warlocks: same as priests.

Against otk decks: YOU WANT TO BE FAST SO DRAW AND ZEPHYRYS ARE YOUR BEST BETS, also kazakus.

I reached a 61.7% Winrate with this deck this season, have fun playing it :)